MarsSeed [1] filed a deletion request for lib32-cairomm [2]: This package has not been updated for 3.5 years. Nothing depends on it on AUR. It's been abandoned, and no one was in any hurry to adopt it. Therefore this 32-bit package seems safe to delete.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lib32-cairomm/
